Becker



(No Model.) 2 sheets-sheen 2. H. C. AHRBECKER.

PISTON`METER.

No. 455,244. Patented June 30,1891.

WVM/masa@ wfg/ZW which works within a tubular rod F.

ivrTi-n STATns PATENT union.

HENRY CONRAD AHRBEOKER, OF LONDON, ENGLAND.

PISTON METER.

SPECIFICATION forming part of Letters Patent N o. 455,244, dated .T une 30, 1891.

Application led April 8, 1890. Serial No. 347,066. (No model.) Patented in England February 23. 1889, No. 3,293, and in Belgium January 16, 1890, No. 89,196.

To @ZZ whom it may concern:

Be it known that I, HENRY CONRAD AHR- BECKER, residing at Vaterloo Bridge Road, London, in the county of Surrey, England, have invented certain new and useful Improvements in Vl'iiquid-Meters, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention was patented in Belgium, No. 89,196,dated Januaryl, 1390,and in Great Britain, No. 3,293, dated February 23, 1389.

This invention relates to meters for liquids, and especially to the variety known as piston meters.7

The principal object of the invention is to Work the valves which alternate the pressure on the piston in such manner that the stroke of the piston shall be reversed with certainty, whether the piston movement be quick or slow.

A further object is to generally improve the construction of the piston meters.

Figure 1 is a central section, partly in elevation, of ameter made according to this invention. Fig. 2 is a rear elevation of the valvegear connected to the piston-rod. Fig. 3 is a a plan on the line x x, Fig. 1.

A indicates the measuring-cylinder of the meter. This cylinder contains a reciprocating piston B, which is suitably packed to iit the cylinder. The cylinder head or cover l 1has a port C, opening from chamber G above the measuring-cylinder into said cylinder above the piston. AL passage D leads from the chamber G through the wall of the cylinder to the chamber of said cylinder below the piston. The piston-rod 3 has a head E, The rod F passes through a stuffing-box 4 or other suitable packing in the cover 1 of the cylinder. The head E of the piston-rod 3 is notched, so as to allow the free passage of uid into the interior of the tubular rod F. The lower end of the tubular rod F is turned in at 5, so that head E will engage with said iuturned end as the piston-rod is drawn downward. Chamber G contains Vthe valve-gear and is supplied from an inlet-pipe H, so that the chamber G is subject to the pressure of the Huid-supply. The outlet-pipe Icommuuicates with a central exhaust-port G, which is be- -tween the ports or passages (l and D, and

port G is in communication with one or the other passage C D, according to the position of the slide-valve J, which valve J is operated 'in usual manner to open one passage and close the other. The slide-valve J has a valve-rod K, and this rod has two projecting tappets 7c and k2 and carries also a pivoted pawl 7c3, which pawl engages teeth of ratchetwheel L. The ratchet-wheel L is mounted on a worin-shaft Z', and the Worm engages awormwheel Z2 on a spindle 7, that passes through a suitable packing in bearing 8 into compartment M and actuates suitable gearing to move an indicator or pointer to indicate the amount of iiuid which passes through the'meter. The rod F bears a rigid arm f, which arm is slotted, and a stud 10 passes through the slot and is adj ustable therein. Stud 10 enters a slotted link R, which link has a stud 9, which enters a slot 12 in arm 11 of a three-armed lever N. This lever or tumbler N has an arm 13, which carries a roller n in the space between the tappets 7c and 7a2 ot valve-rod K, hereinbefore referred to. The third arm 14 of the tumbler N has a roller n which rides under a double incline 15 of lever P. The lever P is pivoted to a suitable bracket or support 16, and its end opposite the pivot 4is connected to a spring-actuated rod 17 by nut 18, or a weight 19 (dotted lines, Fig. 2) may be substituted for the spring-actuated rod 17 to draw down the free end of the lever P. A spring may be inserted in casing 4l, so as to draw on rod 17. The lever P, with its actuating spring or weight and its double incline 15, bearing on the roller n of tumbler N, maybe termed the actuaton The pawl 2O serves as a check against backward movement ofthe ratchet L. The rod F may have an arm 2l, which slides on a guiding-stud 22 to prevent rotation of saidrod F.

Vhen the parts vare in the position shown in full lines in Fig. 1, the piston being at the lower end of its stroke, fluid willbe admitted by passage D to the chamber below the piston, thus raising said piston. The fluid above the piston will flow through passages C and 6 and out through the outlet-pipe I. The piston-rod 3 will telescope into rod F until the piston B bears against said rod, when the rods IOO 3 and Il' will continue the movement together. The piston-rod, being telescopic or extensible, as described, will permit a piston movement ot' one-half thelength of the cylinder without causing any movement of the valvegear. The meter of the proportions shown will thus register twice the quantity ot' fluid with a given number of valve movements, as if the rod were not extensible. Rod F carries arm j with it by means ot link R. The tumblerN is shifted as the arm f nears the cud ot its upstroke, moving roller n under the incline 15 of the actuator. Vhen the roller l5 has passed the center of this incline, the power of the spring or Weight l) will tend to quickly shift the tumbler, and with it the slide-valve J, by means of the roller yn on the tumbler engaging tappets 7s. and 7,'2 on the valverod K.

The shifting of valve J opens passage C to the fluid-pressure from chamber G and puts passage D into comn'iunication with outlet I The movement of the piston will be reversed, but piston-rod 3 Will be drawn out from rod I? until the head E reaches the end 5 of rod F, when rod F will move with the piston. The reverse movement of arm f and link R causes a reversal of the movement of roller fn across the incline l5 of the actuator-lever P, and having passed the center of this incline the actuator will serve to shift the valve in reverse direction, thus reversing all the movements.

The shifting of valve in one direction serves to move the ratchet L the distance ot one tooth, and this ratchet through the worm and a suitable train actuates the indicator. The duid contents of the cylinder being known, the meter will indicate the quantity of fluid passed through it. The rodF might be made integral with the piston-rod; but by making the rod telescopic the valve-gear can be made compact, however long the piston-stroke may be.

By means ot' the actuator and tumbler the slide-valve is moved quickly at about the time of the completion ot the stroke of the piston, and is not moved at all until the piston has substantially completed its stroke, the final movement of the valve being eifccted by the actuator and bcingindepcndent of the Vfinal piston movement. 3y thus making the final movement of the slide-valve independent of the final piston movement, increased certainty oi action is secured.

XVhat I claim isl. rlhe combination, in a piston meter, of a cylinder, a reciprocating piston therein, a piston-rod and link connecting the same to a three-armed tumbler, avalve actuated by the tumbler, and a spring-livressed lever having a double-inclined bearing on one arm ofthe tumbler, substantially as described.

2. The combination of the cylinder, piston, shifting-valve having a pawl engaging the registering-train, a tumbler acting ou the valve to shift the same, and a link connecting the piston-rod and tumbler, and a mechanical actuator engaging the tumbler to move the same independently ot' the final piston movement, substantially as described.

The combination of a cylinder, piston, telescopic piston-rod, three-armed tumbler, and link connecting the same to the pistonrod, with the slide-valve engaging one arm of the tumbler, the ratchet connected to the registering-train, and a paWl connected to the valve and acting on said ratchet, substantially as described.

In testimony whereof I aiiix my si gnatu rc in presence of two Witnesses.

HENRY CON RAD AIIRBECKER.

\V itnesses: A

JOHN lf. S. UMDLAND, lil, A. BRADY. 

